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本文基于前面的文章eureka-server的实现。参考

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                <h1 id="spring-cloud-2-x版本-Config配置中心教程"><a href="#spring-cloud-2-x版本-Config配置中心教程" class="headerlink" title="spring cloud 2.x版本 Config配置中心教程"></a>spring cloud 2.x版本 Config配置中心教程</h1><h2 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h2><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">本文采用Spring cloud本文为2.1.8RELEASE，version=Greenwich.SR3</span><br></pre></td></tr></table></figure>

<blockquote>
<p>本文基于前面的文章eureka-server的实现。<br>参考</p>
<ul>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d8194a2e51d4561ea1a9506">eureka-server</a></li>
</ul>
</blockquote>
<h2 id="概述"><a href="#概述" class="headerlink" title="概述"></a>概述</h2><p>在分布式系统中，由于服务数量巨多，为了方便服务配置文件统一管理，所以需要分布式配置中心组件。Spring Cloud Config为分布式系统中的外部化配置提供服务器和客户端支持。</p>
<p>本篇涉及项目的结构为一个Config Server单机模式和适用于链接Git仓库，一个Config Client通过server来展示配置文件数据。 同时使用两个bus来模拟配置文件刷新。</p>
<h2 id="创建config-server工程"><a href="#创建config-server工程" class="headerlink" title="创建config-server工程"></a>创建config-server工程</h2><p>Config-server功能</p>
<ul>
<li>用于外部配置的http，基于资源的api</li>
<li>加密和解密属性</li>
<li>使用可嵌入spring boot的应用程序</li>
</ul>
<h3 id="1-1-创建配置中心server：config-server"><a href="#1-1-创建配置中心server：config-server" class="headerlink" title="1.1 创建配置中心server：config-server"></a>1.1 创建配置中心server：config-server</h3><h3 id="1-2-添加config-server的pom-xml相关依赖"><a href="#1-2-添加config-server的pom-xml相关依赖" class="headerlink" title="1.2 添加config-server的pom.xml相关依赖"></a>1.2 添加config-server的pom.xml相关依赖</h3><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.cloud<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-cloud-config-server<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.cloud<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-cloud-starter-netflix-eureka-client<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>



<h3 id="1-3-添加config-server的application添加配置信息"><a href="#1-3-添加config-server的application添加配置信息" class="headerlink" title="1.3 添加config-server的application添加配置信息"></a>1.3 添加config-server的application添加配置信息</h3><figure class="highlight yml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">#加载本地文件配置</span></span><br><span class="line"><span class="attr">spring:</span></span><br><span class="line">  <span class="attr">application:</span></span><br><span class="line">    <span class="attr">name:</span> <span class="string">config-server</span></span><br><span class="line">  <span class="attr">profiles:</span></span><br><span class="line">    <span class="attr">active:</span> <span class="string">native</span> <span class="comment">#加载本地配置</span></span><br><span class="line">  <span class="attr">cloud:</span></span><br><span class="line">    <span class="attr">config:</span></span><br><span class="line">      <span class="attr">server:</span></span><br><span class="line">        <span class="attr">native:</span> <span class="comment">#加载本地目录文件</span></span><br><span class="line">          <span class="attr">search-locations:</span> <span class="string">/Users/xxxx/config-server</span></span><br><span class="line"></span><br><span class="line"><span class="attr">server:</span></span><br><span class="line">  <span class="attr">port:</span> <span class="number">13081</span></span><br><span class="line"></span><br><span class="line"><span class="attr">eureka:</span></span><br><span class="line">  <span class="attr">instance:</span></span><br><span class="line">    <span class="attr">hostname:</span> <span class="string">eureka1.client.com</span></span><br><span class="line">    <span class="attr">lease-renewal-interval-in-seconds:</span> <span class="number">5</span></span><br><span class="line">    <span class="attr">lease-expiration-duration-in-seconds:</span> <span class="number">10</span></span><br><span class="line">  <span class="attr">client:</span></span><br><span class="line">    <span class="attr">service-url:</span></span><br><span class="line">      <span class="attr">defaultZone:</span> <span class="string">http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/</span></span><br></pre></td></tr></table></figure>



<h3 id="1-4-启动类ConfigServerApplication增加注解"><a href="#1-4-启动类ConfigServerApplication增加注解" class="headerlink" title="1.4 启动类ConfigServerApplication增加注解"></a>1.4 启动类ConfigServerApplication增加注解</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> spring.cloud.demo.configserver;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.SpringApplication;</span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.autoconfigure.SpringBootApplication;</span><br><span class="line"><span class="keyword">import</span> org.springframework.cloud.config.server.EnableConfigServer;</span><br><span class="line"></span><br><span class="line"><span class="meta">@EnableConfigServer</span></span><br><span class="line"><span class="meta">@SpringBootApplication</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ConfigServerApplication</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title function_">main</span><span class="params">(String[] args)</span> &#123;</span><br><span class="line">        SpringApplication.run(ConfigServerApplication.class, args);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<blockquote>
<p>至此，一个单机本地config-server就搭建完成</p>
</blockquote>
<h3 id="1-5-创建配置中心client：config-client"><a href="#1-5-创建配置中心client：config-client" class="headerlink" title="1.5 创建配置中心client：config-client"></a>1.5 创建配置中心client：config-client</h3><h3 id="1-6-添加config-client的pom相关依赖"><a href="#1-6-添加config-client的pom相关依赖" class="headerlink" title="1.6 添加config-client的pom相关依赖"></a>1.6 添加config-client的pom相关依赖</h3><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.cloud<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-cloud-starter-config<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.cloud<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-cloud-starter-netflix-eureka-client<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>

<h3 id="1-7添加config-client的bootstrap-yml相关配置-注意这里不是application-yml"><a href="#1-7添加config-client的bootstrap-yml相关配置-注意这里不是application-yml" class="headerlink" title="1.7添加config-client的bootstrap.yml相关配置(注意这里不是application.yml)"></a>1.7添加config-client的bootstrap.yml相关配置(注意这里不是application.yml)</h3><p>bootstrap.yml</p>
<figure class="highlight yml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">spring:</span></span><br><span class="line">  <span class="attr">application:</span></span><br><span class="line">    <span class="attr">name:</span> <span class="string">config-client</span></span><br><span class="line">  <span class="attr">cloud:</span></span><br><span class="line">    <span class="attr">config:</span></span><br><span class="line">      <span class="attr">label:</span> <span class="string">master</span></span><br><span class="line">      <span class="attr">profile:</span> <span class="string">dev</span></span><br><span class="line">      <span class="attr">fail-fast:</span> <span class="literal">true</span></span><br><span class="line">      <span class="attr">uri:</span> <span class="string">http://localhost:13081</span> <span class="comment">#通过域名访问配置中心服务端</span></span><br><span class="line">      <span class="attr">discovery:</span></span><br><span class="line">        <span class="attr">enabled:</span> <span class="literal">true</span></span><br><span class="line"><span class="attr">eureka:</span></span><br><span class="line">  <span class="attr">instance:</span></span><br><span class="line">    <span class="attr">hostname:</span> <span class="string">eureka1.client.com</span></span><br><span class="line">    <span class="attr">lease-renewal-interval-in-seconds:</span> <span class="number">5</span></span><br><span class="line">    <span class="attr">lease-expiration-duration-in-seconds:</span> <span class="number">10</span></span><br><span class="line">  <span class="attr">client:</span></span><br><span class="line">    <span class="attr">service-url:</span></span><br><span class="line">      <span class="attr">defaultZone:</span> <span class="string">http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/</span></span><br></pre></td></tr></table></figure>



<h3 id="1-8新建从服务端请求的配置文件config-client-dev-yml"><a href="#1-8新建从服务端请求的配置文件config-client-dev-yml" class="headerlink" title="1.8新建从服务端请求的配置文件config-client-dev.yml"></a>1.8新建从服务端请求的配置文件config-client-dev.yml</h3><blockquote>
<p>客户端从服务端获取资源配置的路径规则：</p>
<ul>
<li>&#x2F;{application}&#x2F;{profile}[&#x2F;{label}]</li>
<li>&#x2F;{application}-{profile}.yml</li>
<li>&#x2F;{label}&#x2F;{application}-{profile}.yml</li>
<li>&#x2F;{application}-{profile}.properties</li>
<li>&#x2F;{label}&#x2F;{application}-{profile}.properties</li>
</ul>
</blockquote>
<p>本文采用第二种规则。</p>
<p>配置内容：</p>
<figure class="highlight yml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">spring:</span></span><br><span class="line">  <span class="attr">application:</span></span><br><span class="line">    <span class="attr">name:</span> <span class="string">config-client</span></span><br><span class="line"></span><br><span class="line"><span class="attr">server:</span></span><br><span class="line">  <span class="attr">port:</span> <span class="number">52601</span></span><br><span class="line"></span><br><span class="line"><span class="attr">eureka:</span></span><br><span class="line">  <span class="attr">instance:</span></span><br><span class="line">    <span class="attr">hostname:</span> <span class="string">eureka1.client.com</span></span><br><span class="line">    <span class="attr">lease-renewal-interval-in-seconds:</span> <span class="number">5</span></span><br><span class="line">    <span class="attr">lease-expiration-duration-in-seconds:</span> <span class="number">10</span></span><br><span class="line">  <span class="attr">client:</span></span><br><span class="line">    <span class="attr">service-url:</span></span><br><span class="line">      <span class="attr">defaultZone:</span> <span class="string">http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/</span></span><br><span class="line"></span><br><span class="line"><span class="attr">info:</span> <span class="string">local-config-client-dev</span></span><br></pre></td></tr></table></figure>

<p>将新建的config-client-dev.yml放到config-server配置的&#x2F;Users&#x2F;xxxx&#x2F;config-server目录下，如果config-server没有配置目录，默认使用resources目录下。</p>
<h3 id="1-9-ConfigClientApplication增加注解"><a href="#1-9-ConfigClientApplication增加注解" class="headerlink" title="1.9 ConfigClientApplication增加注解"></a>1.9 ConfigClientApplication增加注解</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> spring.cloud.demo.configclient;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.SpringApplication;</span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.autoconfigure.SpringBootApplication;</span><br><span class="line"><span class="keyword">import</span> org.springframework.cloud.client.discovery.EnableDiscoveryClient;</span><br><span class="line"></span><br><span class="line"><span class="meta">@EnableDiscoveryClient</span></span><br><span class="line"><span class="meta">@SpringBootApplication</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ConfigClientApplication</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title function_">main</span><span class="params">(String[] args)</span> &#123;</span><br><span class="line">        SpringApplication.run(ConfigClientApplication.class, args);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br><span class="line"></span><br></pre></td></tr></table></figure>

<h3 id="2-0-创建测试类"><a href="#2-0-创建测试类" class="headerlink" title="2.0 创建测试类"></a>2.0 创建测试类</h3><p>在config-client创建测试Controller：ConfigClientController</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> spring.cloud.demo.configclient.controller;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.springframework.beans.factory.annotation.Value;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.RequestMapping;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.RestController;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 测试是否能获取到配置信息的controller</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@auther</span>: maomao</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@DateT</span>: 2019-09-17</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@RestController</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ConfigClientController</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Value(&quot;$&#123;info&#125;&quot;)</span></span><br><span class="line">    <span class="keyword">private</span> String info;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@RequestMapping(&quot;/config/info&quot;)</span></span><br><span class="line">    <span class="keyword">public</span> String <span class="title function_">info</span><span class="params">()</span> &#123;</span><br><span class="line">        <span class="keyword">return</span> info;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



<h3 id="2-1-启动相关服务"><a href="#2-1-启动相关服务" class="headerlink" title="2.1 启动相关服务"></a>2.1 启动相关服务</h3><p>分别启动eureka-server、config-server、config-client。访问：<a target="_blank" rel="noopener" href="http://localhost:52601/config/info%EF%BC%8C%E6%98%BE%E7%A4%BA%E5%A6%82%E4%B8%8B">http://localhost:52601/config/info，显示如下</a></p>
<p>![image-20190923104137281](&#x2F;Users&#x2F;fengfujie&#x2F;Library&#x2F;Application Support&#x2F;typora-user-images&#x2F;image-20190923104137281.png)</p>
<p>证明本地配置文件已经生效。</p>
<h3 id="2-2-从远程git加载资源配置文件"><a href="#2-2-从远程git加载资源配置文件" class="headerlink" title="2.2 从远程git加载资源配置文件"></a>2.2 从远程git加载资源配置文件</h3><p>修改config-server的application.yml配置文件：</p>
<figure class="highlight yml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">##加载本地文件配置</span></span><br><span class="line"><span class="comment">#spring:</span></span><br><span class="line"><span class="comment">#  application:</span></span><br><span class="line"><span class="comment">#    name: config-server</span></span><br><span class="line"><span class="comment">#  profiles:</span></span><br><span class="line"><span class="comment">#    active: native #加载本地配置</span></span><br><span class="line"><span class="comment">#  cloud:</span></span><br><span class="line"><span class="comment">#    config:</span></span><br><span class="line"><span class="comment">#      server:</span></span><br><span class="line"><span class="comment">#        native: #加载本地目录文件</span></span><br><span class="line"><span class="comment">#          search-locations: /Users/fengfujie/config-server</span></span><br><span class="line"></span><br><span class="line"><span class="comment">#加载远程git仓库资源文件</span></span><br><span class="line"><span class="attr">spring:</span></span><br><span class="line">  <span class="attr">application:</span></span><br><span class="line">    <span class="attr">name:</span> <span class="string">config-server</span></span><br><span class="line">  <span class="attr">cloud:</span></span><br><span class="line">    <span class="attr">config:</span></span><br><span class="line">      <span class="attr">server:</span></span><br><span class="line">        <span class="attr">git:</span></span><br><span class="line">          <span class="comment"># 配置git仓库的地址</span></span><br><span class="line">          <span class="attr">uri:</span> <span class="string">https://github.com/fengfujie25/sping-cloud-config</span></span><br><span class="line">          <span class="comment"># git仓库的账号</span></span><br><span class="line">          <span class="attr">username:</span> <span class="string">xxxxxx</span></span><br><span class="line">          <span class="comment"># git仓库的密码</span></span><br><span class="line">          <span class="attr">password:</span> <span class="string">xxxxxx</span></span><br><span class="line"></span><br><span class="line"><span class="attr">server:</span></span><br><span class="line">  <span class="attr">port:</span> <span class="number">13081</span></span><br><span class="line"></span><br><span class="line"><span class="attr">eureka:</span></span><br><span class="line">  <span class="attr">instance:</span></span><br><span class="line">    <span class="attr">hostname:</span> <span class="string">eureka1.client.com</span></span><br><span class="line">    <span class="attr">lease-renewal-interval-in-seconds:</span> <span class="number">5</span></span><br><span class="line">    <span class="attr">lease-expiration-duration-in-seconds:</span> <span class="number">10</span></span><br><span class="line">  <span class="attr">client:</span></span><br><span class="line">    <span class="attr">service-url:</span></span><br><span class="line">      <span class="attr">defaultZone:</span> <span class="string">http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/</span></span><br></pre></td></tr></table></figure>

<p>重新启动config-server服务。然后刷新<a target="_blank" rel="noopener" href="http://localhost:52601/config/info%E5%9C%B0%E5%9D%80%EF%BC%8C%E6%98%BE%E7%A4%BA%E5%A6%82%E4%B8%8B">http://localhost:52601/config/info地址，显示如下</a></p>
<p>![image-20190923105019135](&#x2F;Users&#x2F;fengfujie&#x2F;Library&#x2F;Application Support&#x2F;typora-user-images&#x2F;image-20190923105019135.png)</p>
<p>证明已经成功获取了远程git资源的配置信息。</p>
<h3 id="2-3-通过服务名称访问config-server"><a href="#2-3-通过服务名称访问config-server" class="headerlink" title="2.3 通过服务名称访问config-server"></a>2.3 通过服务名称访问config-server</h3><p>以上配置都是通过域名访问的config-server，为了保证系统的高可用，因为生产环境的配置服务中心都是集群配置，所有客户端才通过服务名称来访问。</p>
<p>修改config-client的bootstrap.yml</p>
<figure class="highlight yml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">spring:</span></span><br><span class="line">  <span class="attr">application:</span></span><br><span class="line">    <span class="attr">name:</span> <span class="string">config-client</span></span><br><span class="line">  <span class="attr">cloud:</span></span><br><span class="line">    <span class="attr">config:</span></span><br><span class="line">      <span class="attr">label:</span> <span class="string">master</span></span><br><span class="line">      <span class="attr">profile:</span> <span class="string">dev</span></span><br><span class="line">      <span class="attr">fail-fast:</span> <span class="literal">true</span></span><br><span class="line">      <span class="comment">#uri: http://localhost:13081 #通过域名访问配置中心服务端</span></span><br><span class="line">      <span class="attr">discovery:</span></span><br><span class="line">        <span class="attr">enabled:</span> <span class="literal">true</span></span><br><span class="line">        <span class="attr">service-id:</span> <span class="string">config-server</span> <span class="comment">#通过服务访问配置中心服务端</span></span><br><span class="line"></span><br><span class="line"><span class="attr">eureka:</span></span><br><span class="line">  <span class="attr">instance:</span></span><br><span class="line">    <span class="attr">hostname:</span> <span class="string">eureka1.client.com</span></span><br><span class="line"></span><br><span class="line">    <span class="attr">lease-renewal-interval-in-seconds:</span> <span class="number">5</span></span><br><span class="line">    <span class="attr">lease-expiration-duration-in-seconds:</span> <span class="number">10</span></span><br><span class="line">  <span class="attr">client:</span></span><br><span class="line">    <span class="attr">service-url:</span></span><br><span class="line">      <span class="attr">defaultZone:</span> <span class="string">http://eureka1.server.com:8701/eureka/,http://eureka2.server.com:8702/eureka/,http://eureka3.server.com:8703/eureka/</span></span><br></pre></td></tr></table></figure>

<blockquote>
<p>spring.cloud.config.discovery.service-id：通过服务名称访问配置中心服务端</p>
</blockquote>
<p>重新启动config-client.并访问<a target="_blank" rel="noopener" href="http://localhost:5301/config/info%EF%BC%8C%E6%98%BE%E7%A4%BA%E7%BB%93%E6%9E%9C%E5%90%8C%E3%80%902.2%E3%80%91%E5%88%99%E4%BB%A3%E8%A1%A8%E9%85%8D%E7%BD%AE%E4%BF%A1%E6%81%AF%E5%B7%B2%E7%94%9F%E6%95%88%EF%BC%8C%E8%AF%81%E6%98%8E%E6%98%AF%E9%80%9A%E8%BF%87%E6%9C%8D%E5%8A%A1%E5%90%8D%E7%A7%B0%E8%AE%BF%E9%97%AE%E7%9A%84config-server">http://localhost:5301/config/info，显示结果同【2.2】则代表配置信息已生效，证明是通过服务名称访问的config-server</a>.</p>
<blockquote>
<p>至此，spring cloud集成config的配置就全部完成。但是存在一个问题，如果修改远程git仓库的资源配置，项目并不会刷新，所以配置信息是不生效的。</p>
</blockquote>
<h2 id="2-4-动态刷新config-server配置"><a href="#2-4-动态刷新config-server配置" class="headerlink" title="2.4 动态刷新config-server配置"></a>2.4 动态刷新config-server配置</h2><p>动态刷新config-serve配置方式</p>
<ul>
<li>基于RabbitMQ动态刷新</li>
<li>原生刷新（伪动态刷新）</li>
</ul>
<p>本文采用比较简单的原生刷新方式。</p>
<h5 id="2-4-1增加相关pom-xml依赖"><a href="#2-4-1增加相关pom-xml依赖" class="headerlink" title="2.4.1增加相关pom.xml依赖"></a>2.4.1增加相关pom.xml依赖</h5><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.springframework.boot<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>spring-boot-starter-actuator<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>

<h5 id="2-4-2-在ConfigClientController增加-RefreshScope注解"><a href="#2-4-2-在ConfigClientController增加-RefreshScope注解" class="headerlink" title="2.4.2 在ConfigClientController增加@RefreshScope注解"></a>2.4.2 在ConfigClientController增加@RefreshScope注解</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> spring.cloud.demo.configclient.controller;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.springframework.beans.factory.annotation.Value;</span><br><span class="line"><span class="keyword">import</span> org.springframework.cloud.context.config.annotation.RefreshScope;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.RequestMapping;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.RestController;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@auther</span>: maomao</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@DateT</span>: 2019-09-17</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@RestController</span></span><br><span class="line"><span class="meta">@RefreshScope</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ConfigClientController</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Value(&quot;$&#123;info:error&#125;&quot;)</span></span><br><span class="line">    <span class="keyword">private</span> String info;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@RequestMapping(&quot;/config/info&quot;)</span></span><br><span class="line">    <span class="keyword">public</span> String <span class="title function_">info</span><span class="params">()</span> &#123;</span><br><span class="line">        <span class="keyword">return</span> info;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p>此方式同时还要修改@Value注解内容为@Value(“${info:error}”)，因为刷新的时候需要配置信息有默认值，否则会报错。</p>
<h5 id="2-4-3-重新启动config-client"><a href="#2-4-3-重新启动config-client" class="headerlink" title="2.4.3 重新启动config-client"></a>2.4.3 重新启动config-client</h5><p>访问<a target="_blank" rel="noopener" href="http://localhost:5301/config/info%EF%BC%8C%E7%9C%8B%E6%9C%8D%E5%8A%A1%E6%98%AF%E5%90%A6%E5%8F%AF%E4%BB%A5%E6%AD%A3%E5%B8%B8%E8%AE%BF%E9%97%AE%E3%80%82">http://localhost:5301/config/info，看服务是否可以正常访问。</a></p>
<p>然后可以修改git资源仓库中的配置信息。</p>
<ul>
<li><p>通过post访问：<a target="_blank" rel="noopener" href="http://localhost:5301/actuator/refresh%EF%BC%8C%E6%98%BE%E7%A4%BA%E5%A6%82%E4%B8%8B%EF%BC%9A">http://localhost:5301/actuator/refresh，显示如下：</a></p>
<p>![image-20190923115000716](&#x2F;Users&#x2F;fengfujie&#x2F;Library&#x2F;Application Support&#x2F;typora-user-images&#x2F;image-20190923115000716.png)</p>
</li>
<li><p>刷新<a target="_blank" rel="noopener" href="http://localhost:5301/config/info%EF%BC%8C%E7%BB%93%E6%9E%9C%E6%98%BE%E7%A4%BA%EF%BC%9A">http://localhost:5301/config/info，结果显示：</a></p>
<p>![image-20190923115101228](&#x2F;Users&#x2F;fengfujie&#x2F;Library&#x2F;Application Support&#x2F;typora-user-images&#x2F;image-20190923115101228.png)</p>
</li>
</ul>
<p>证明refresh已经生效。</p>
<p>此方式每次都需要手动刷新一下才行，比较麻烦。GitHub提供一种Webhooks方法可以实现不用每次手动刷新。</p>
<p>![image-20190923122041185](&#x2F;Users&#x2F;fengfujie&#x2F;Library&#x2F;Application Support&#x2F;typora-user-images&#x2F;image-20190923122041185.png)</p>
<p>Payload URL: 触发后回调的URL</p>
<p>Content type: 数据格式，两种一般使用json</p>
<p>Secret: 用作给POST的Body加密的字符串，采用HMAC算法</p>
<p>Events: 触发的事件列表</p>
<table>
<thead>
<tr>
<th>事件类型</th>
<th>描述</th>
</tr>
</thead>
<tbody><tr>
<td>Just the <code>push</code> event</td>
<td>仓库有push的时候触发，默认事件</td>
</tr>
<tr>
<td>Send me everything</td>
<td>派我来一切</td>
</tr>
<tr>
<td>Let me select individual events</td>
<td>选择个别事件</td>
</tr>
</tbody></table>
<p>这样我们就可以利用Webhook的机制去触发客户端的更新，但是当客户端越来越多的时候，Webhook机制也不够优雅，每次增加客户端都需要改动Webhook也不现实。</p>
<p>其实，Spring cloud给了我们更好的解决方案-spring cloud bus。</p>
<p>spring cloud bus后续更新。</p>
<h2 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h2><blockquote>
<p>本文简单的实现了config-server和config-client的单机和远程git仓库的配置的调用以及配置信息的简单的动态更新。</p>
</blockquote>
<h2 id="代码地址"><a href="#代码地址" class="headerlink" title="代码地址"></a>代码地址</h2><ul>
<li><p><a target="_blank" rel="noopener" href="https://github.com/fengfujie25/spring-cloud-demo/tree/master/config-server">gitHub地址:config-server</a></p>
</li>
<li><p><a target="_blank" rel="noopener" href="https://github.com/fengfujie25/spring-cloud-demo/tree/master/config-client">gitHub地址:config-client</a></p>
</li>
</ul>
<hr>
<center><font color=red>《Srping Cloud 2.X小白教程》目录</font></center>

<ul>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d8194a2e51d4561ea1a9506">spring cloud 2.x版本 Eureka Server服务注册中心教程</a></li>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d82061be51d4561f95eeaf5">spring cloud 2.x版本 Eureka Client服务提供者教程</a></li>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d82ef25f265da03f12e920f">spring cloud 2.x版本 Ribbon服务发现教程(内含集成Hystrix熔断机制)</a></li>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d82061be51d4561f95eeaf5">spring cloud 2.x版本 Feign服务发现教程(内含集成Hystrix熔断机制)</a></li>
<li><a target="_blank" rel="noopener" href="https://juejin.im/post/5d8451bbf265da03da24cf7c">spring cloud 2.x版本 Zuul路由网关教程</a></li>
<li><a href="">spring cloud 2.x版本 config分布式配置中心教程</a></li>
<li>spring cloud 2.x版本 Hystrix Dashboard断路器教程</li>
</ul>

                
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